Energy consumption induces climate change but at the same time modifications in climate impact energy sector both in term of supply capacity and shifts in energy demands. Different regions will be affected in different ways and this paper aims at analysing the issue at European level. Usually rising sea levels, extremes of weather and an increase in the frequency of droughts and floods are indicated play havoc with the world's energy systems but they can be hardly estimated and this study will be limited to the effects of the increase in average temperature. Tipping points are also taken out of any quantitative assessment. Structure of the EU energy budget is presented, shifts in energy demand, vulnerabilities of supply and risks for energy infrastructure are discussed in order to, eventually, provide figures of possible further threats to continental energy security.